Improvement in hot-air furnaces



2 Sheets--Sheet 1.

W. E. HENDERSON.

" Hot-Air Furnaces.

No. 197,128. Patented Nov. 13,1877.

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% @z/M f w ATTORNEYS NJETERS. PHOTO-UTMOGRAPNER. WASHINGTON D C 2Sheets-Sheen 2.

W. E. HENDERSON.

Hot-Air Furnaces.

No. 197,128. Patented Nov. 13, 1877.

WlTN ESSES INVENTOR ATTORNEYS N.PETERS, PHOTO-LITHOGRAPHER WASHINGTON 0G PATENT OFFICE.

WILLIAM E. HENDERSON,

OF WINONA, MINNESOTA.

IMPROVEMENT IN HOT-AIR FURNACES.

Specification forming part of Letters Patent No. 197,128, dated November13, 1877; application filed March 25, 1876.

To all whom it may concern:

Be it known that 1, WILLIAM E. HENDER- SON, of Winona, of the county ofWinona and State of Minnesota, have invented a new and Improved Hot-AirFurnace; and I do hereby declare the following to be a full, clear, andexact description of the same, reference being had to the accompanyingdrawing, forming part of this specification, in Which- Figure 1 is afront elevation of my improved hot-air furnace or heater, the doorsbeing represented open, and Fig. 2 is a sectional side view.

The invention is an improvement in a class of tubular hot-air furnacesor heaters in which a horizontal diaphragm is employed to divert orchange the direction of the current of the products of combustion, andcause them to traverse two sets of horizontal flues arranged one abovethe other.

The improvement relates to a heater composed of two'groups or systems offlues joined to a single central hollow head, and provided with hollowend heads having doors and soot discharge apertures, the arrangement ofthe two groups or systems of flues being such that the soot may beremoved from both at the same operation and by the same instrument. Afurther advantage is likewise secured in the regulation of the draft bythe adjustment of the doors, all as hereinafter described.

The furnace proper, A, supports the radiator, which is composed of threehollow heads, B D D, and horizontal tubes G G. The three tubes arearranged vertically and parallelly, and the central one is provided witha horizontal diaphragm, a, and thus divided into two compartments-anupper and lower. The front head D is entirely open on the front side,and provided with hinged swinging doors E for closing. the same. Therear head D is similar to the front one, D, except that the opening inits outer side is smaller, and closed by a removable plug or slide, F.

From the lower compartment of the central head B the products ofcombustion pass in opposite directions right and left, through the lowertubes of each group G connected therewith, and which constitute half ofthewhole number of tubes, (in practice forty-four.)

The products of combustion thus conducted into the end heads D D ascendand pass along the upper tubes G of each group, the currents reunitingin the upper compartment of the central head B, and escaping thence intothe flue H leading to the chimney. The tubes composing each group beingeach arranged exactly opposite similar tubes in the other group, and thefront head D being entirely open in the front side, a swab can beintroduced and run through two tubes at once, thus effecting an economyof time and labor. The soot, which is pushed out of the tubes by theswab, will fall either into the central or rear head. That portion whichfalls into the rear head D may be removed through the opening closed bythe detachable plug F. The portion falling into the lower compartment ofthe central head 13 will pass directly downward into the furnace A, andthe portion collecting in the upper compartment of said head will becarried back into the rear head by the swab as it passes through fromone of the aligned tubes to another.

Another advantage is derived from the combination and arrangement of thetwo sets of tubes, in that the doors E of the radiator can be openedwhile the furnace is in full operation without danger of smoke issuingtherefrom into the apartment, for, in such case, the rear group of tubesconduct the smoke to the flue H, and the draft and amount of radiatedheat are regulated-13. 6., lessened --correspondingly. It is obviousthis could not be done if the radiator were composed of a single groupof tubes.

What I therefore claim is The improved heater or radiator composed ofthe vertical and parallel hollow heads B D D, provided, respectively,with the horizontal diaphragm a, doors E E, and removable plug F, andthe two groups of tubes G G, connecting the heads, and arranged inalignment, all as shown and described, for the purposes specified.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two .Witnesses.

WILLIAM E. HENDERSON.

Witnesses:

L. A. Honenvs, GEO. C. ONEssIz.

